Improvement in machines for dressing stone



` speciiicaion, in which- NITED STATES PATENT Ormes.

ISAAC FRFLIGH, OF BARDSTOWN, KENTUCKY.

IMPROVEMENT IN MACHINES FOR DRESSING STONE.

Specilication forming part of Letters Patent No. 33,19] dated September3, i861.

To all whom t may concern:

Be it known that I, ISAAC FRELIGH, of Bardstown, in the countyof Nelsonand State of Kentucky, have invented a new and useful Improvement linMachines for Dressing Stones; and I do hereby declare that the folflowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings, making part ot' this Figure l isa side elevation of my machine. Fig. 2 is a plan. Fig. 3 is a rearelevation.

f Similar letters of reference indicate corresponding parts in theseveral figures.

The subject of my invention is a machine for dressing and fu rrowingmillstones of every description to suit the dierent kinds of grain to beground; and the invention consists in the peculiar construction andarrangement of parts, hereinafter explained.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

A represents the bed-plate of my machine,

,provided on its under side with a strip a4, of

gum-elastic or analogous substance, (shown in blue,) for the purpose ofcausing it to cleave to the face of the stone to be dressed, and therebyprevent vibration or moving about of the machine while in operation.

B B represent two lateral ways attached on opposite sides ofthebed-plate.

C is a' sliding frame fitted so as to have movement upon the ways B.

D is a screw journaled parallel with and midway of the ways B in boxesa' a', attached to the bed-plate. 'lhesaid screw works through a 'n utZJ, attached to the under side of the sliding frame C, by which meansthe frame is moved in a lateral direction. t

E represents a carriage supporting the aetnating mechanism of themachine and fitted to slide longitudinally to the sliding frame C and atright angles to the motion of the latter. The carriage is moved forwardand backward by a screw F, journaled in boxes at each end y of thesliding frame and working through a nut attached to the under side ot'the carriage in precisely the same manner as the sliding frame.

G represents a rock-shaft fitted in boxes c c,

provided with a vertical slotted arm d, which receives the shank of thepick-handle II.

I is a horizontal arm attached to the under side of the rock-shaft andprovided with an adjustable face a, against which the projections f inthe face-plate M impinge as the shaft N is revolved, and thereby impartan intermittent motion to the pick.

The shank of the pick, fitting the vertical slotted arm, can be adjustedand secured by means of a screw, so as to accommodate picks of differentlengths and have them always strike the face of the stone at the sameangle.

H is the pick-stock, provided with a socket 7L', which fits upon the endof the handle II. The pick-stock is secured upon the handle by means ofa screw g,the point of which enters a latitudinal groove g made in thatportion of the handle iitted within the socket and represented by dottedlines in Fig. 1. This groove permits the pick-stock to be adjusted, sothat the pick will always strike square upon its edge.

Fig. 4 represents another form of pick-stock an'd pick, which is morelparticularly intended for light work. H" is the stock, provided with asocket It, by which it is attached to the pickhandle in the same manneras the other stock. B' represents a `hinged lid, between which and thestock the pick C' is secured by a clamp D', embracing the stock and lid.The upper end of the pick rests against the follower E', provided on oneside with ratchetteeth, which engage in corresponding teeth in thestock. (Shown in dotted lines in Fig.

4.) This construction of pick-stock admits of a ready adjustment of thepick and at the same time holds it rigidly in position.

J and K are rag-wheels secured, respectively, upon shafts J and K', towhich are attached springs L L', bearing upward, the former beneath thehandle H and the latter beneath the horizontal arm I, for the purpose ofadjusting the stroke of the pick and regulating its force.

M is a disk-plate secured upon shaftNand provided with a series ofradial slots, in which the Shanks of pins f fare inserted and secured byscrew-nuts n n. The shaft N has its bearings in boxes O O of thecarriage. P is a balance-wheel secured upon one end of the shaft Auponthe bed-plate.

N, and Q a bevel gear-wheel secured Aupon the opposite end, which worksinto a bevel gear-wheel R, which is provided with a hollow journal p,fitted to revolve in box S, attached to the carriage.

T is a shaft fitted at one end in a bix Z, attached to the verticalstandard V, secured The said shaft is supported at its other end in thehollow journal, through which it passes. A feather in the hollowjournal, fitting into a groove in the shaft T, causes the two to revolvesimultaneously, and at, the same time permits the hollow journal andgear-wheel to have lateral movement upon the shaft.

V represents a rock-shaft, with a slotted arm q secured upon one end andan arm fr upon the opposite end, which works in a cam-groove formed inthe periphery of the wheel \V, secured upon the end of the shaft T.

t is a flanged gear-wheel fitted loosely upon the end of the screw F,and s is a ratchetwheel keyed tothe same on the outside of the flangedgear-wheel. A forward or backward motion is imparted to the carriage bymeans of a spring-catch s', Working into the teeth of the ratchet-Wheels as the iianged gear-wheel is revolved by means of the rack t',connected with the slotted arm. By adjusting the wristpin m in theslotted arm q the feed can be regulated to suit the quality of Vworkdesired, The motion of the carriage is changed. by shifting the positionof the spring-catch. The sliding frame is moved laterally by means ofthe gear-wheel 7' Working into the pinion 7c, secured upon the end ofthe screw D.

By the above-described construction and arrangement of parts a machineis produced which is capable of doing a great Variety of work. All theparts being made adjustable, it is equally calculated to do coarse orfine cracking, facing, or furrowing.

Having thus described my invention, what I claim as new herein, anddesire to secure by Letters Patent, is- A 1. The combination of thefeathered shaft T, cam-wheel W, rock-shaft V, arms qq", rack t', flangedgear-wheel t, and screw-shaft F, operating in the manner explained toimpart au intermittent motion to the carriage E ot'v an automaticstone-dressing machine. i

2. The rag-wheels J K, shafts J K', andl springs L L', operatingin`conjunction to adjust the pick and regulate' its stroke, as eX-plained.

